From 51ba747afcde4335b7b7888b179da1d6d4917152 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Wed, 11 Aug 2010 11:40:45 -0700 Subject: [PATCH] * config/i386/i386.h (HARD_REGNO_CALL_PART_CLOBBERED): New. From-SVN: r163103 --- gcc/ChangeLog | 4 ++++ gcc/config/i386/i386.h | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 92e6b580859..f9ce2f45701 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2010-08-11 Richard Henderson + + * config/i386/i386.h (HARD_REGNO_CALL_PART_CLOBBERED): New. + 2010-08-11 Nick Clifton * config/stormy16/stormy16-lib2.c (__cmpsi2): New function. diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index a2acc7131f7..7fd874b93f8 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -1104,6 +1104,12 @@ enum target_cpu_default : (MODE) == QImode && (REGNO) > BX_REG && !TARGET_64BIT ? SImode \ : (MODE)) +/* The only ABI that saves SSE registers across calls is Win64 (thus no + need to check the current ABI here), and with AVX enabled Win64 only + guarantees that the low 16 bytes are saved. */ +#define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \ + (SSE_REGNO_P (REGNO) && GET_MODE_SIZE (MODE) > 16) + /* Specify the registers used for certain standard purposes. The values of these macros are register numbers. */ -- 2.30.2